Just some notes on editing videos in Blender.

blender_vid_editing_notes.md

Multiple audio tracks in a video

Blender doesn't recognize multiple audio tracks and will only provide the first (as far as I can tell).

What I instead do is:

1. Rip the other audio track(s) into a separate audio file using ffmpeg.
2. In Blender, click "add" and then "sound".
3. Select the freshly ripped audio track.

Below is an example of the ffmpeg command.

$name='vid_name'; ffmpeg -i "${name}.mp4" -vn -acodec copy -map 0:a:1 "${name}_aud.mp4"; mv "${name}_aud.mp4" "${name}_aud.mp3"

A couple of notes:

1. This is done in PowerShell, since I'm usually editing on my Windows PC.
2. The -vn flag means no video.
3. The -acodec copy means use the same codec as the original video file.
4. The -map 0:a:1 argument means rip the second audio track (a for audio, 1 for the second track because it's zero-based).